Myriophyllum crispatum Orchard

Water-milfoil

Brunonia 8: 210 (1986) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Perennial aquatic or marsh herb, stout; stems 25–60 cm tall, mostly 3–5(–9) mm diam., sparsely pubescent, the hairs simple, usually crisped, 0.2–0.25 mm long, rarely glabrous, rooting at nodes in fully emergent plants. Leaves dimorphic; submerged leaves in whorls of 5–8, ovate, 10–40 mm long, pectinate, with 12–20 pinnae; emergent leaves in whorls of 6–9, broadly lanceolate, 5–20 mm long, shortly pectinate, uppermost ones terete. Bracteoles of male flowers lanceolate to ovate, 0.6–0.7 mm long, entire; bracteoles of female flowers smaller; flowers sessile, solitary. Male flowers: sepals 4, ovate to oblong, 0.6–0.8 mm long; petals 4, 2–2.6 mm long, cream to reddish-brown or purplish, caducous; stamens 8. Female flowers: sepals and petals absent; ovary 4-celled, styles filiform, reflexed, stigmas white. Fruit cubiform, yellow-brown to deep red; mericarps cylindric, c. 1 mm long, prickly with sharp papillae, tapering slightly, apex obliquely truncate. Flowers mainly Oct.–Apr.

CVU, DunT, EGL, GipP, Glep, Gold, GGr, HNF, HSF, MuF, MuM, NIS, OtP, OtR, VRiv, VVP, WaP, Wim. Also WA, SA, Qld, NSW, ACT, Tas. Widespread throughout much of Victoria, particularly in drier areas, where found mostly in stagnant water and on mud.

Readily identified by the presence of crisped hairs on the stems and leaf-bases, a character occuring nowhere else in the genus (Orchard 1985).

Source: Jeanes, J.A. (1996). Haloragaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2017-08-16
 
References

Orchard, A.E. (1985). Myriophyllum (Haloragaceae) in Australasia. II. The Australian Species, Brunonia 8: 173-291.

Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder [Saxifraganae]
order Saxifragales
family Haloragaceae
genus Myriophyllum
Higher taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Myriophyllum crispatum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Myriophyllum crispatum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Murray Mallee present native
Wimmera present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Fans present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Otway Ranges present native

State distribution

Distribution map
State
Western Australia
South Australia
Queensland
New South Wales
Australian Capital Territory
Victoria
Tasmania